American International School of Costa Rica, AIS (formerly the Costa Rica Academy) was founded in 1970. This school has a student body of a little over 200 students and is located in Cariari, near the outskirts of San Jose. Classes are taught in English and students graduate with a US High School Diploma. (They also have to option to graduate with a Costa Rican National Baccalaureate.) The school prides itself on have a high teacher to student ratio. Most classes average 16 students. The student body is comprised of over 25 different nationalities.